Air curtain is installed on the indoor side of doors and windows to prevent water accumulation and freezing in the heat exchanger coils.
Published time:
2021-09-20
The installation of the FM and RM series air curtains is the same. Simply loosen the positioning screws on the bottom front of the unit, separate the unit from the base plate, and then securely fix the base plate to the door frame or wall (loose fixing will cause vibration and noise). Hang the unit directly on the floor, and then use the removed positioning screws to fix the unit to the base plate.
FM and RM series air curtains share the same installation process. Simply loosen the positioning screws on the front bottom of the unit, separate the unit from the base plate, and then securely fix the base plate to the door frame or wall (loose fixing will cause vibration and noise). Hang the unit directly on the floor, and use the removed positioning screws to fix the unit to the base plate as before. Note: When hanging the unit, do not omit the rubber shock absorbers. For water-heating air curtains, in addition to using the same model as above, two hanging holes are used for fixing and leveling. It is strictly forbidden to install without the base plate, relying only on hanging. Otherwise, it will cause mechanical shaking and noise, affecting the service life of the machine. Also, check whether the power voltage and the selected switch wire cross-section match the installed air curtain. The RM series water-heating air curtain should be installed on the indoor side of the door and window to prevent water from freezing and cracking in the heat exchanger coils. According to the selected heating medium, the corresponding water supply and drainage pipelines should be equipped, and the pipelines should be insulated. When using hot water as the medium, water enters from the bottom and returns from the top. An automatic air vent should be installed at the return water outlet or at the highest point of the main pipe. When using hot water as the medium, use softened water. Before each operation of the water-heating air curtain, the condensate or mixed gas in the heat exchanger should be drained, preheated for 10 minutes, and then the air curtain should be turned on. When the air curtain is stopped, the water in the coils must be drained. When the water-heating air curtain is operating in winter, continuous or timed heat supply is required to ensure the operating status of the air curtain. Prolonging the service life of the motor, it is not allowed to only heat without starting the fan.
Indoor water trays that are not cleaned regularly can easily become breeding grounds for dirt and grime. Viruses can proliferate in air curtain machines, threatening human health. Therefore, air curtains should be cleaned regularly. Regular cleaning is beneficial to the use of air curtains. Cleaning should not be limited to the outer surface; the impeller and bearings should also be oiled. Axial flow electric heating air curtains refer to air curtains where the fan part is powered by an axial flow fan. The direction of airflow is parallel to the axis of the motor, hence the name axial flow fan. This type of fan requires a relatively high speed to provide airflow for the air curtain. Axial flow fan motors generally use two-pole motors, with speeds reaching 2900 rpm, so high-frequency noise is generated.
The centrifugal fan is a technology introduced from Japan. There are no specialized academic institutions in our country that have conducted good theoretical research on it. In principle, the air passes through the blade gap twice, so the noise is relatively large. However, since this type of fan uses a four-pole motor, the maximum speed is 1450 rpm. Therefore, although the noise of this type of air curtain is similar to the rated sound pressure level of the axial flow air curtain, the noise frequency is much lower. Therefore, the operating characteristics of the centrifugal air curtain are better than those of the axial flow type. At the same time, because the motor of the axial flow air curtain is located directly above the electric heater, if a phase failure occurs, it is easy to damage the motor. Therefore, it is best not to use an axial flow air curtain. In the family of electric heating air curtains, there is also a low-noise centrifugal electric heating air curtain produced by Dayang Qiaogong. The fan uses a low-noise centrifugal fan as the blower. This type of fan reduces the fan speed to 960 rpm, so the generated sound pressure level and noise frequency are relatively low. At the same time, the impeller diameter of the fan is larger than the previous two, so the air delivery capacity of this air curtain is greater than that of the centrifugal and axial flow types. It is recommended to use this type.
(The above content is all from the Internet. Please contact me if there are any problems.)
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